MCL injury is also part of the  Unhappy Triad , or the common injury of the MCL, ACL, and Meniscus all together, usually through a pivot shift type of mechanism.The most obvious sypmtom of MCL injury is pain. Following the injury, you will experience pain in the knee, usually along the iside of the joint.CL injury is also part of the  Unhappy Triad , or the common injury of the MCL, ACL, and Meniscus all together, usually through a pivot shift type of mechanism.
With hemangiosarcoma, the pericardium fills up with blood due to rupture of the tumor. When the tumor occurs in the skin, a mass or lump can usually be felt in or under the skin. The mass may become ulcerated and bleed. When the tumor occurs in a bone, it can cause pain and discomfort.
A retroperitoneal hematoma is a pocket of blood found in the lower back in an area known as the retroperitoneal space.reating a retroperitoneal hematoma through surgery involves evacuating the collected blood and stopping the cause of bleeding. Retroperitoneal hematomas may grow significantly enough to reduce blood flow to the rest of the body, because the blood is collecting in the peritoneal space.